Ok, I'm just about sick of reading lift pump post but I have maybe a dumb question. If the mid 90's vans came with a mechanical lift pump why can't we put one on our engines and run it in parallel with the stock pump or in series with a smaller facet style pump to increase fuel supply? I haven't looked but I imagine there is only a block off plate where the pump should be.

you can get a plate,or make one or leave the pump on and re route the lines to the other pump

You could get Kennedy's centrifugal pump and pump harness, and it would likely never be a problem again... Then you wouldn't have to mess with mechanical job.

Rob :)

I think you misunderstood I want to run a mechanical pump on a truck that did not originally have one.

Thats where your turbo drain is now. If you put a drain into the pan, you could use a mechanical lift pump, but I wouldn't recommend it, a properly set up electric lift pump is better, IMO.

Are you meaning to say Injector Pump or Lift Pump, we have both in our car. Injector is inside the engine and Lift Pump is outside right underneath the driver on the frame.

Which one are you thinking of?

thank you Plowboy I have not looked at it yet so I wasn't sure if something else was there. My thinking was that since the electric lift pump is so problematic that maybe a mechanical one was a better option. And significantly cheaper 18.99 at the Zone. Is the mechanical pump any more reliable?

I think you misunderstood I want to run a mechanical pump on a truck that did not originally have one.

Thanks, you are right - I misread the post. However, you can increase fuel volume by changing pump, such as the one I suggest. Using a 93 pump will also increase fuel delivery pressure and volume.

Rob :)

thank you Plowboy I have not looked at it yet so I wasn't sure if something else was there. My thinking was that since the electric lift pump is so problematic that maybe a mechanical one was a better option. And significantly cheaper 18.99 at the Zone. Is the mechanical pump any more reliable?
Yes, they are more reliable. Mechanical LPs are built more robust compared to the stock electric LPs (or most aftermarket replacements). The diaphram in the mechanical LPs will, most often, fail before the other (very few) metal parts. When this happens, you can have diesel fuel dump into your crankcase (dilute your oil, etc., etc., etc.).

Most electric LPs have an expected life span that is less than the mechanical design.

You can install an electric LP in series with a mechanical LP if stock/emergency fuel flow is an issue or concern. Whenever you install an electric LP, you should wire it for safety so that it is not energized when the engine is off (can have manual overrride switch for priming/bleeding fuel filter). The electric LPpump should be of the flow-through design.

A couple of primary advantages of an electric LP? You can prime the fuel filter and bleed the air out without having to crank the engine. The electric LP can also act as a check valve to prevent fuel flow back into the fuel tank when negative pressure is present (if your injectors leak, it can cause air to bleed into your fuel system).

Secondary advantage of an electric lift pump? Replacing one is the best way of taking a diesel shower while working on your truck. I really can't think of any other better way. Done a few and am getting better at it.

Regards,
Franko